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Morphological and chemical characterization of tooth enamel exposed to alkaline agents

Taube, F ; Ylmén, R ; Shchukarev, A ; Nietzsche, S ; Norén, J.G

Journal of dentistry, 2010-01, Vol.38 (1), p.72-81 [Periódico revisado por pares]

Kidlington: Elsevier Ltd

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Título:
Morphological and chemical characterization of tooth enamel exposed to alkaline agents
Autor: Taube, F ; Ylmén, R ; Shchukarev, A ; Nietzsche, S ; Norén, J.G
Assuntos: Acids ; Alkalies - pharmacology ; Alkaline ; Apatites - analysis ; Biofilm ; Biological and medical sciences ; Bond strength ; Calcium - analysis ; Carbon - analysis ; Carbonates - analysis ; Chemical and industrial products toxicology. Toxic occupational diseases ; Crystal lattices ; Crystal structure ; Crystallography ; Dental ; Dental Enamel - chemistry ; Dental Enamel - drug effects ; Dental Enamel - ultrastructure ; Dental Pellicle - chemistry ; Dental Pellicle - drug effects ; Dental Pellicle - ultrastructure ; Dental Plaque - chemistry ; Dental Plaque - pathology ; Dental Plaque - physiopathology ; Dentistry ; Detergents - pharmacology ; Domestic and cosmetic products toxicology ; Enamel ; Erosion ; Fluorides ; FTIR ; Gas, fumes ; Humans ; Hydroxides - analysis ; Hydroxides - pharmacology ; Hydroxyapatite ; Medical sciences ; Microscopy, Electron, Scanning ; Odontologi ; Odontology ; Phosphates - analysis ; Phosphorus - analysis ; Photoelectron Spectroscopy ; Potassium Compounds - pharmacology ; SEM ; Spectroscopy, Fourier Transform Infrared ; Sulfuric Acids - pharmacology ; Surface chemistry ; Surface-Active Agents - pharmacology ; Tooth Demineralization - metabolism ; Tooth Demineralization - pathology ; Tooth Demineralization - physiopathology ; Toxicology ; X-Ray Diffraction ; XPS ; XRD
É parte de: Journal of dentistry, 2010-01, Vol.38 (1), p.72-81
Notas: ObjectType-Article-2
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Descrição: Abstract Objectives In this study, morphological and chemical changes in teeth enamel exposed to alkaline agents, with or without surfactants, have been investigated. In addition, chemical effects of the organic surface layer, i.e. plaque and pellicle, were also investigated. Methods The present study was conducted using several techniques: Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Results From XPS-measurements, it was found that exposure to alkaline solutions resulted in a massive removal of carbon from the tooth surface, and that the addition of surfactants increased the rate under present conditions. Based on the results from the FTIR-analysis, no substitution reactions between phosphate, carbonate and hydroxide ions in the enamel apatite could be detected. From a minor SEM-analysis, degradation and loss of substance of the enamel surface was found for the exposed samples. From XRD-analysis, no changes in crystallinity of the enamel apatite could be found between the samples. Conclusions The findings in this study show that exposure to alkaline solutions results in a degradation of enamel surfaces very dissimilar from acidic erosion. No significant erosion or chemical substitution of the apatite crystals themselves could be discerned. However, significant loss of organic carbon at the enamel surface was found in all exposed samples. The degradation of the protective organic layer at the enamel surface may profoundly increase the risk for caries and dental erosion from acidic foods and beverages.
Editor: Kidlington: Elsevier Ltd
Idioma: Inglês;Persa

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Morphological and chemical characterization of tooth enamel exposed to alkaline agents

Taube, F ; Ylmén, R ; Shchukarev, A ; Nietzsche, S ; Norén, J.G

Kidlington: Elsevier Ltd

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